Sister Princess (シスター・プリンセス, Sister Princess?) is an anime television series, based on the manga and video game series of the same name. The television series was aired from April 4 - September 26, 2001, ran for 26 episodes, and 6 volumes of videos were released on VHS and DVD. ADV Films licensed the show for its North American release. E-Kids handles the Chinese dubs of the show in DVD and VCD under the title 妹妹公主 (Mèi Mèi Gōng Zhǔ).

Source: Wikipedia